On Wed, Oct 3, 2012 at 3:49 AM, Nick Overdijk <n...@astrant.net> wrote: > I'm not sure where it was, but CMake prefers gcc over cc, and cxx over g++. > You can force it by setting CC=clang. > > On 2012-03-10, at 09:27:28 , Pere Mato Vila wrote: > >> In my Mac system (10.7.4) with Xcode (4.4.1) CMake finds by default the GNU >> compiler for C and Clang for C++. This posses problems later when building >> my package. The package can be built correctly either with Clang or with >> GCC but not in a mixed mode. See the cmake output: >> >> -- The C compiler identification is GNU 4.2.1 >> -- The CXX compiler identification is Clang 4.0.0 >> -- Checking whether C compiler has -isysroot >> -- Checking whether C compiler has -isysroot - yes >> -- Checking whether C compiler supports OSX deployment target flag >> -- Checking whether C compiler supports OSX deployment target flag - yes >> -- Check for working C compiler: /Developer/usr/bin/gcc >> -- Check for working C compiler: /Developer/usr/bin/gcc -- works >> -- Detecting C compiler ABI info >> -- Detecting C compiler ABI info - done >> -- Check for working CXX compiler: /usr/bin/c++ >> -- Check for working CXX compiler: /usr/bin/c++ -- works >> -- Detecting CXX compiler ABI info >> -- Detecting CXX compiler ABI info - done >> >> >> The question is how this is possible? What is the logic to detect the >> compiler used by CMake? I know that I can force a given compiler with the >> CMAKE_XXX_COMPILER or by defining the environment variables CXX and CC but >> it would be nice that the proper selection is done without any user >> intervention. >> >> % which cc c++ >> /usr/bin/cc >> /usr/bin/c++ >> >> % ls -ls /usr/bin/cc >> 8 lrwxr-xr-x 1 root wheel 5 Aug 22 09:09 /usr/bin/cc -> clang >> % ls -ls /usr/bin/c++ >> 8 lrwxr-xr-x 1 root wheel 7 Aug 22 09:09 /usr/bin/c++ -> clang++ >> >> ------------------------------------------------------------- >> Pere Mato CERN, PH Department, CH 1211 Geneva 23, Switzerland >> e-mail: pere.m...@cern.ch tel: +41 22 76 78696 >> fax: +41 22 76 68792 gsm: +41 76 48 70855 >> >> >> -- >> >> Powered by www.kitware.com >> >> Visit other Kitware open-source projects at >> http://www.kitware.com/opensource/opensource.html >> >> Please keep messages on-topic and check the CMake FAQ at: >> http://www.cmake.org/Wiki/CMake_FAQ >> >> Follow this link to subscribe/unsubscribe: >> http://www.cmake.org/mailman/listinfo/cmake > > -- > > Powered by www.kitware.com > > Visit other Kitware open-source projects at > http://www.kitware.com/opensource/opensource.html > > Please keep messages on-topic and check the CMake FAQ at: > http://www.cmake.org/Wiki/CMake_FAQ > > Follow this link to subscribe/unsubscribe: > http://www.cmake.org/mailman/listinfo/cmake
The mismatch problem should be fixed in the builds of CMake 2.8.10-rc1 that we released yesterday. Give that a try and see if the default compiler selection is better here -- it should be. Let us know if there's still an issue... Thanks, David -- Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the CMake FAQ at: http://www.cmake.org/Wiki/CMake_FAQ Follow this link to subscribe/unsubscribe: http://www.cmake.org/mailman/listinfo/cmake